The ‘Sky Blue Diamond‘, a celestial diamond of 8.01 carats mounted on a Cartier ring, was sold at auction by Sotheby’s in Geneva on November 16, the price of the jewel estimated between 15 and 25 million dollars was awarded to a figure of 17.1 million. Sotheby’s has recently experienced two world record for the blue-colored diamonds. In November 2015 he beat ‘The Blue Moon of Josephine’ for 48.5 million dollars, while in May ‘The Oppenheimer Blue’ of 14.62 carats was attributed to 57.5 million dollars.